Tin phytate coated magnesium hydroxide: green strategy and effect analysis for improving the flame retardant properties of polyurea materials

Tin phytate-coated magnesium hydroxide is a new flame retardant, and its impact on the flame retardant properties of polyurea materials is a topic worth exploring. The design of phytic acid tin (PAT) coated magnesium hydroxide (Mg(OH)_2) aims to further optimize the flame retardant performance of magnesium hydroxide through organic-inorganic hybridization and explore its Application potential in polymer materials such as polyurea. Here is a comprehensive analysis of this topic:

Preparation principle of phytic acid tin coated magnesium hydroxide The synthesis of phytic acid tin coated magnesium hydroxide usually involves a solution method or a precipitation method, in which phytic acid, as a ligand of tin ions, forms a coating layer on the surface of magnesium hydroxide particles through chemical reactions. The multiple hydroxyl groups and phosphate groups in the phytic acid molecule can form stable complexes with metal ions (such as tin ions). This coating process can not only improve the dispersibility of magnesium hydroxide, but also play multiple flame retardant mechanisms during the combustion process, such as forming an isolation layer and inhibiting the generation of free radicals. Influence on the flame retardant properties of polyurea 2.1 Improved flame retardant efficiency Enhanced thermal stability: The presence of the phytic acid tin coating layer can increase the thermal decomposition temperature of magnesium hydroxide, prolong its stable existence time at high temperatures, effectively absorb and consume the heat generated by combustion, and thus improve the flame retardant properties of polyurea materials. Synergistic flame retardant effect: Tin phytate itself also has a certain flame retardant effect, and works together with the decomposition products of magnesium hydroxide (such as water vapor and magnesium oxide) to form a more effective flame retardant barrier to inhibit the spread of flames.

2.2 Improved mechanical properties Improved interfacial compatibility: The coating layer can act as a "bridge" to enhance the interfacial bonding between magnesium hydroxide and the polyurea matrix, and reduce the degradation of mechanical properties caused by the addition of flame retardants, such as improving the tensile strength and toughness of the material. 2.3 Reduced smoke and toxic gas generation Smoke suppression effect: During the combustion process, magnesium hydroxide coated with tin phytate helps reduce the generation of smoke because the oxides and water vapor formed are cleaner than uncoated magnesium hydroxide.

Low toxicity and environmental protection: By optimizing the decomposition path of flame retardants and reducing the release of toxic gases, it meets the high standards of modern materials for environmental protection and safety.

Conclusion and Prospect Tin phytate-coated magnesium hydroxide as a flame retardant additive for polyurea materials shows good flame retardant properties and environmental friendliness. It provides a new flame retardant solution for polymer materials such as polyurea through multiple mechanisms such as improving thermal stability, enhancing interfacial compatibility, and reducing smoke and harmful gas emissions. Future research can further explore the specific effects of different coating conditions and ratios on flame retardant properties, as well as the long-term stability and economic feasibility in practical applications, to promote the commercialization of such environmentally friendly flame retardant materials.